At present, the 20-foot horn antenna used by penzias and Wilson when they discovered 3K background radiation more than 40 years ago can be made into glasses, and a conversion system is set in these glasses, which can compress the received background radiation wavelength by 7 orders of magnitude and convert the 7cm wave into red light. In this way, the audience can wear these glasses at night and see the 3K background radiation of the universe with their own eyes.
Extended data
Physical knowledge in three-body;
1, after the death of the universe and beyond. In order to avoid this kind of future, only a large number of substances in the small universe made by different civilizations can return to the big universe, but if this is done, the small universe will not survive and people in the small universe can only return to the big universe. This is the return movement. -"Three-body"
2. Gravity waves. The Luo Ji family saw the gravitational wave antenna from a distance, but it took the bus half an hour to get there. Only then did they really feel its greatness. The antenna is a horizontally placed cylinder, with a length of1500m and a diameter of more than 50m, suspended at a position about 2m above the ground. Its surface is also a smooth mirror, half reflecting the sky and half reflecting the North China Plain. -"Three-body"
3. Black holes. As an astrophysicist, Ye is very sensitive to nuclear weapons. She knows that this is the power that stars have. She knows that there are more terrible forces in the universe, such as black holes and antimatter. Compared with those forces, thermonuclear bomb is just a mild candle. -"Three-body"